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Effect of public smoking ban in Helena, Montana: When results look too good to be true, they probably are

BMJ 2004; 328 doi: (Published 03 June 2004) Cite this as: BMJ 2004;328:1379
  1. Geoffrey Kabat, epidemiologist (
  1. 16 Bon Air Avenue, New Rochelle, NY 10804

    EDITOR—As a cancer researcher who has published extensively on the harmful effects of smoking, I am in favor of vigorous smoking bans. However, the study by Sargent et al, claiming that the six month smoking ban in Helena, Montana, was associated with an immediate 40% drop in heart attacks must be viewed with scepticism.1

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